docs(skills): pin ip-as-logo upstream attribution to author, repo and commit

The ported skill carried the upstream MIT text but the LICENSE file did not
say where it came from, and the frontmatter only pointed at the repo via a
non-standard `homepage:` key. Reviewers asked for proper attribution.

- LICENSE: header naming the upstream repo, the pinned upstream commit
  (b1bf517c54a4…) and the copyright holder (s1dashu) above the verbatim MIT text.
- SKILL.md: `metadata.hermes.upstream: <repo> (pinned b1bf517c)` — the same
  shape mono-color and pr-lens use — and the adaptation-notes blockquote now
  links the upstream repo and commit so the generated docs page links the source.
- Regenerated website/docs/user-guide/skills/optional/creative/creative-ip-as-logo.md
  with website/scripts/generate-skill-docs.py (scoped to this skill).

optional-skills/creative/ip-as-logo/LICENSE

@@ -1,3 +1,8 @@
+ip-as-logo — ported from https://github.com/s1dashu/ip-as-logo-skill
+Upstream snapshot: commit b1bf517c54a407452cfaca98a54668cd052f8e63 (2026-08-20)
+Upstream author / copyright holder: s1dashu (https://github.com/s1dashu)
+The MIT license text below is reproduced verbatim from the upstream LICENSE.
+
 MIT License
 
 Copyright (c) 2026 s1dashu

optional-skills/creative/ip-as-logo/SKILL.md

@@ -2,14 +2,14 @@
 name: ip-as-logo
 description: "Design minimal cute IP mascot marks readable at 32px."
 version: 1.0.0
-author: s1dashu (https://github.com/s1dashu/ip-as-logo-skill), ported by Hermes Agent
+author: s1dashu (https://github.com/s1dashu, upstream s1dashu/ip-as-logo-skill), ported by Hermes Agent
 license: MIT
 platforms: [linux, macos, windows]
 metadata:
   hermes:
     tags: [logo, mascot, branding, ip-character, image-generation, creative]
     category: creative
-    homepage: https://github.com/s1dashu/ip-as-logo-skill
+    upstream: https://github.com/s1dashu/ip-as-logo-skill (pinned b1bf517c)
     related_skills: [pixel-art]
 ---
 
@@ -18,7 +18,10 @@ metadata:
 Create the simplest possible cute IP character: a compact, lovable symbol that remains recognizable at `32 × 32`, not a detailed character illustration. Use when a user wants a mascot, IP character, brand character, or "cute logo" for a product, repo, app, or community.
 
 > **Hermes adaptation notes** (the rest of this document is the upstream
-> workflow, kept intact — snapshot of commit `b1bf517c`, Aug 20 2026):
+> workflow, kept intact — snapshot of
+> [s1dashu/ip-as-logo-skill](https://github.com/s1dashu/ip-as-logo-skill)
+> commit [`b1bf517c`](https://github.com/s1dashu/ip-as-logo-skill/commit/b1bf517c54a407452cfaca98a54668cd052f8e63),
+> Aug 20 2026, MIT — see `LICENSE`):
 >
 > - **Image generation path**: use the built-in `image_generate` tool with
 >   `aspect_ratio="square"`. The active backend is user-configured — do not